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Basic and Diluted Earnings Per Share | 12 Months Ended
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May 31, 2012
Basic and Diluted Earnings Per Share [Abstract] |
Basic and Diluted Earnings Per Share | Note B — Basic and Diluted Earnings Per Share Basic and diluted earnings per share were calculated as follows:
|  | Year ended May 31, |
In millions, except per share amounts |  | 2012 |  |  | 2011 |  |  | 2010 |
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 548.0 |  |  | $ | 515.3 |  |  | $ | 477.0 |
Weighted-average common shares outstanding |  |  | 362.4 |  |  |  | 361.8 |  |  |  | 361.4 |
Basic earnings per share |  | $ | 1.51 |  |  | $ | 1.42 |  |  | $ | 1.32 |
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 548.0 |  |  | $ | 515.3 |  |  | $ | 477.0 |
Weighted-average common shares outstanding |  |  | 362.4 |  |  |  | 361.8 |  |  |  | 361.4 |
Dilutive effect of common share equivalents at average market price |  |  | 0.6 |  |  |  | 0.6 |  |  |  | 0.3 |
Weighted-average common shares outstanding, assuming dilution |  |  | 363.0 |  |  |  | 362.4 |  |  |  | 361.7 |
Diluted earnings per share |  | $ | 1.51 |  |  | $ | 1.42 |  |  | $ | 1.32 |
Weighted-average anti-dilutive common share equivalents |  |  | 9.9 |  |  |  | 11.5 |  |  |  | 13.0 |
Weighted-average common share equivalents that had an anti-dilutive impact are excluded from the computation of diluted earnings per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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